--- a/src/hotspot/share/runtime/mutexLocker.cpp	Fri Aug 16 09:18:35 2019 +0200
+++ b/src/hotspot/share/runtime/mutexLocker.cpp	Fri Aug 16 09:18:38 2019 +0200
@@ -126,8 +126,6 @@
 Mutex*   OldSets_lock                 = NULL;
 Monitor* RootRegionScan_lock          = NULL;
 
-Monitor* GCTaskManager_lock           = NULL;
-
 Mutex*   Management_lock              = NULL;
 Monitor* Service_lock                 = NULL;
 Monitor* PeriodicTask_lock            = NULL;